Graphical Addition: The sum of two vectors of fixed magnitudes has its minimum magnitude when the angle between these vectors is
A. 0°.
B. 90°.
C. 270°.
D. 180°.
E. 360°.
Answer: D
You might also like to view...
A 4.0-?C charge is situated at the origin of an xy-coordinate system. What is the potential difference between the points x = 4.0 m and y = 2.0 m because of this charge?
A) -9.0 × 103 V B) 9.0 × 103 V C) -36 × 103 V D) 36 × 103 V E) 0 V
A 3.50-kg block is pulled along a moving conveyor belt at a constant speed of 0.500 m/s relative to a stationary observer while the belt moves at a constant speed of 0.200 m/s in the same direction. If the coefficient of kinetic friction is 0.400, the magnitude of the mechanical energy dissipated, in J, caused by the force of friction on the block in 8.00 s is
a. 5.6. b. 22.0. c. 32.9. d. 54.8. e. 76.8.
Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature?
a. 218.15 b. 233.15 c. 273.15 d. 40.15 e. 0
The change in entropy of a mass m of a solid substance which has a latent heat of fusion LF and melts at a temperature T is
a. LFT/m b. mLF ln(T) c. mLFT d. mLF/T e. LF/mT